#include <iostream>
#include <string>
using namespace std;
class A {
    mutable int a;

   public:
    A() {
        cout << "Default constructor called\n";
    }
    A(const A& a) {
        cout << "Copy Constructor called\n";
    }
};
int main(int argc, char const* argv[]) {
    A obj;
    A a1 = obj;
    A a2(obj);
}